如果楼主需要做类似隐藏显示的功能，可以通过js调用相应对象的css就可以了，其css为display，显示为display="block",隐藏为display="none"
楼主可能会呵呵，我还是废话写一下好了：
如果有两个标签,开始的时候显示t1隐藏t2
<input type=text id="t1">
<input type=text id="t2" style="display:'none'">
如果需要在js中显示t2而隐藏t1
document.getElementById("t1").style.display="none"
document.getElementById("t1").style.display="block"
1、对于多重循环语句的一次性跳出goto语句是最方便，几乎所有语言都提供了goto语句，当然还可使用exit for（vb6)等语句一层层跳出。
2、很多人不顾一切的反对goto语句，其实是错误的，goto用对了地方是很方便的。
3、vb6示例:(按行查找第一个值为100的元素位置）
Private Sub Command1_Click()Dim i As Integer, j As Integer, n(100, 100) As Integer
For i = 0 To 100
For j = 0 To 100
n(i, j) = Int(Rnd * 100) + 1
Next
Next
For i = 0 To 100
For j = 0 To 100
If n(i, j) = 100 Then GoTo js
Next
Next
js:
Debug.Print n(i, j), i, j
End Sub
@echo off:start
cls
title 欢迎使用文件关联修复工具
color 0a
echo "****************************************************"
echo " 盗版不究 "
echo " 此程序在WINDOWS XP SP1/SP2测试通过 "
echo " 发布时间:2008.10.03 06:00p.m. "
echo "****************************************************"
echo.
echo A -修复EXE文件关联
echo.
echo B -修复COM文件关联
echo.
echo C -修复TXT文件关联
echo.
echo D -修复BAT/CMD文件关联
echo.
echo E -修复SCR文件关联
echo.
echo F -修复REG文件关联
echo.
echo G -修复HTML/HTM文件关联
echo.
echo H -修复PIF文件关联
echo.
echo I -修复LNK文件关联
echo.
echo J -修复JS文件关联
echo.
echo K -修复VBS文件关联
echo.
echo L -修复INI文件关联
echo.
echo M -修复INF文件关联
echo.
echo N -修复CHM文件关联
echo.
echo O -修复HLP文件关联
echo.
echo P -修复HTA文件关联
echo.
echo Q -修复JPG文件关联
echo.
echo R -修复GIF文件关联
echo.
echo 0 -退出
ECHO.
ECHO 输入您要修复的文件关联的代号:
set choice=
set /p choice=
if /I "%choice%"=="A" goto EXE
if /I "%choice%"=="B" goto COM
if /I "%choice%"=="C" goto TXT
if /I "%choice%"=="D" goto BAT
if /I "%choice%"=="E" goto SCR
if /I "%choice%"=="F" goto REG
if /I "%choice%"=="G" goto HTML
if /I "%choice%"=="H" goto PIF
if /I "%choice%"=="I" goto LNK
if /I "%choice%"=="J" goto JS
if /I "%choice%"=="K" goto VBS
if /I "%choice%"=="L" goto INI
if /I "%choice%"=="M" goto INF
if /I "%choice%"=="N" goto CHM
if /I "%choice%"=="O" goto HLP
if /I "%choice%"=="P" goto HTA
if /I "%choice%"=="Q" goto JPG
if /I "%choice%"=="R" goto GIF
if /I "%choice%"=="0" goto EXIT
:EXE
assoc .exe=exefile
ftype exefile="%1"%*
goto start
:COM
assoc .com=comfile
ftype comfile="%1"%*
goto start
:TXT
assoc .txt
ftype txtfile=%SystemRoot%\system32\NOTEPAD.EXE %1
:BAT
assoc .bat=batfile
ftype batfile="%1" %*
assoc .cmd=cmdfile
ftype cmdfile="%1" %*
goto start
:SCR
assoc .scr=scrfile
ftype scrfile="%1" /S
goto start
:REG
assoc .reg=regfile
ftype regfile=regedit.exe "%1"
goto start
:HTML
assoc .html=htmlfile
ftype htmlfile="%Program Files%\Internet Explorer\iexplore.exe" -nohome
goto start
:PIF
assoc .pif=piffile
ftype piffile="%1" %*
goto start
:LNK
assoc .lnk=lnkfile
reg delete "HKCR\lnkfile\CLSID" /v "@" /f
reg add "HKCR\lnkfile\CLSID" /v "@" /t "REG_SZ" /d "{00021401-0000-0000-C000-000000000046}" /f
goto start
:JS
assoc .js=jsfile
ftype jsfile=%SystemRoot%\System32\WScript.exe "%1" %*
goto start
:VBS
assoc .vbs=VBSFile
ftype vbsfile=%SystemRoot%\System32\WScript.exe "%1" %*
goto start
:INI
assoc .ini=inifile
ftype inifile=%SystemRoot%\System32\NOTEPAD.EXE %1
goto start
:INF
assoc .inf=inffile
ftype inffile=%SystemRoot%\System32\NOTEPAD.EXE %1
goto start
:CHM
assoc .chm=chm.file
ftype chm.file="hh.exe" %1
goto start
:HLP
assoc .hlp=hlpfile
ftype hlpfile=winhlp32.exe %1
goto start
:HTA
assoc .hta=htafile
ftype htafile=mshta.exe "%1" %*
goto start
:JPG
assoc .jpg=jpegfile
ftype jpegfile=rundll32.exe shimgvw.dll,ImageView_Fullscreen %1
goto start
:GIF
assoc .gif=giffile
ftype giffile=rundll32.exe shimgvw.dll,ImageView_Fullscreen %1
goto start
:EXIT
echo Do you want to exit the progarm?(y/n)
set choice=
set /p choice=
if /I "%choice%"=="n" goto start
exit
